Combined solid-fuel and gas range.



CHARLES H. MILLER & CARL H. MILLER, JR.

COMBINED SOLID FUEL AND GAS RANGE.

APPLICATION FILED JULY 19. 1909.

966,1 84, Patented May 31,1910.

2 SHEETS-SHEET 1.

ATTEST' InvEnTores BY ATTYS.

CHAR-LES H. MILLER & CARL H. MILLER, JR. COMBTNED SOLID FUEL AND GASRANGE.

APPLICATION FILED JULY 19. 1909. 96$,184, Patented May 31,1910.

2 SHEETS-SHEET 2- U TE SEES P FFIGE.

CHARLES H. MILLER AND CARL H. MILLER, JR., 0]? CLEVELAND, OI-IIO.

COMBINED SOLID-FUEL AND GAS RANGE.

Specification of Letters Patent.

Patented May 31, 1910.

To all whom it may concern:

Be it known that we, OHAELEs H. MILLER and CARL H. MILLER, J r.,citizens of the United States, residing at Cleveland, in the county ofCuyahoga and State of Ohio,have invented certain new and usefulImprovements in Combined Solid -Fuel and Gas Ranges, of which thefollowing is a specification.

In the accompanying drawings, Figure 1 is an end elevation of the range,and Fig. 2 is a perspective view thereof. Fig. 3 is a sectionalelevation of the range across fire pot and oven, and Fig. .i is a planview thereof with the top of the range removed, and Fig. 5 is a centralcross section. Fig. 6 is a cross section of the fire pot and partsimmediately associated therewith, and Fig. 7 is a sectional detail of anautomatic cut off in the gas supply connection for the front top gasburners.

The invention as thus disclosed provides for a fire box B or pot inwhich coal, wood, or other solid fuel may be burned and from which thereis a draft flue 2 over the rear half of the range and thence down byflue 3 at the rear when a down draft is wanted. Otherwise the draft isdirect to the flue or pipe 4 over the top of the range as usual bydamper 5. In this connection it may be explained that the products ofcombustion from the fire pot spread across the entire rear area of therange after entering the throat of the down flue 3 and from which thesaid products distribute themselves generally beneath the oven or at thebottom over plate 6, as plainly shown. It will be seen, also, that therange has six holes for pots, and that the first two holes, 8,immediately over the fire pot, and the two rear holes 9 are exposed atall times to the heat products from the fire pot, but if gas be used forthese holes the two gas burners G are adapted to be swung up into usingposition under holes 8, as seen in Figs. 3 and 4:. Otherwise saidburners lie back out of the way in hood 10. In this instance a guardplate 12 is hinged at its lower edge and adapted to be swung up topositon to cover the said burners C and form one side of the said pot,but when the said burners are used said plate is turned down in the firepot as in Fig. 3. Now, as a further conception of the present inventionwe have formed a special gas sub-division or space at the front and topof the range comprising two burners, D, which occupy said subdivision orcompartment located between the top plate P of the range and plate Enext beneath and which compartment comes in front of draft flue 2 fromthe fire pot. Said compartment has a wall 14E which divides the top ofthe range lengthwise between said plates P and E into two equal parts,the said gas burners D occupying the front part and flue 2 being behindthe said plate. The said gas burners D are removably supported in theirpositions as shown and are supplied with gas and controlled by needlevalves as gas burners usually are and when used are entirely out offfrom the solid fuel portion and passages of the range by means of wall 11 at the rear and cross wall and damper 15 at the front and which alsoshuts off the fuel-box. Said wall 14: has one or more draft openings 13controlled by a damper 16 through which draft is opened for said burnersto rear flue space 2 and thence to the chimney flue. It will also benoticed that the top of the gas burner compartment over burners D isprovided with openings corresponding to said burners, and of course theproducts of combustion from the fire-pot cannot enter this space whendampers 15, 16 and 17 are closed. The dampers 15 and 17 are adapted toturn down when opened, while damper 16 slides to open holes 13, and byputting lids on the holes over burners D and opening dampers 15 and 17the products of combustion from the fire pot have free course over theentire top of the stove and through the gas burner compartment as wellas by flue 2. In such case the burners D are usually removed and this isprovided for in their couplings with the gas supply pipe Gr.

Incident to the exclusive use of the range for gas we provide a gasburner H in the bottom of the oven adapted to be used for heating theoven and from which the proclucts of combustion pass out at the top ofthe oven to the chimney flue, the passage 20 for said products beingbetween the intermediate plate E of the top of the range and plate Fnext beneath the same and consti tuting the top plate of the oven. Theusual direct damper 5, Fig. 1 is used in the chimney flue.

It will be seen by the foregoing that at least four of the six holes canalways be used whether hard or gaseous fuel be burned, and by closingdirect damper 5 when the gas burners G are used the rear holes 9 getsufficient heat to do some kinds of cooking.

The front guard plate and side wall 12 of the fire pot are provided witha catch 0 adapted to be engaged by a sliding latch plate 23, which has afinger grip 2% at the front running in a slot in the stove wall, andsaid latch or plate 23 also is adapted to engage beneath the stem 25 ofthe rear gas burner C when it is raised and thus hold connected burnersC up in using position. In this case the plate 12 is down. Again, thegas supply pipe D which carries gas burners C has one end, Fig. 7,provided with gas inlet opening 0 from the fixed gas connection or valveE. This opening is so positioned that when the said burners G areretired into hood 10 out of use the said opening is automatically cutoff by the rotation of pipe D in fixture valve E and no gas can thenflow to the burners. It follows that the said gas passage is only openedwhen the burners are up for use, Fig. 3. So it occurs that all danger ofescape of gas to the range when other fuel than gas is used isabsolutely avoided, and there are no valves which can be tampered withto affect this security to the range and none to be opened or controlledby hand.

In the event that burners D are removed it is obviously necessary thatopenings 26 at the front of the stove through which the supply ends ofthe burners project should be closed to prevent the products ofcombustion from escaping at said joints. A slide damper 27 is thereforeused to close said openings.

The range as described permits either one or all four gas burners to beused at one time, and in fact even all of the six top openings may beused for cooking when employing gas, because the heat products fromburners C may be caused to pass through flue 2 beneath rear covers 9 byclosing damper 15 as shown in Fig. 3 and this will heat holes 9. Thenwhen coal or wood is used in fire pot B all the six holes may be heatedtherefrom by opening dampers 15 and 17. Burners D may remain in placewhen firing in this manner but are preferably removed and slide damper27 closed. As a rule, however, when coal or wood is used as a fuel andgas too in burners D, dampers 15 and 17 are closed, thus permitting saidgas burners D to be fired at the front of the stove while the remainingfour openings 8 and 9 at the side and rear respectively are being firedby the hard fuel from the fire pot. When solid fuel is used, especiallycoke, quick starting is promoted in fire pot B by means of gas burner 30arranged from front to rear thereof beneath grate 29, and the gasconnections for this burner comprise valve 31 and vertical pipe 32 whichconnects with supply pipe G, see Fig. 2. Guard plates 35, one of whichis perforated for the upward passage of the gases and flames from burner30, are arranged beneath grate 29 to direct the How of ashes centrallyto ashpit 34; and the perforated plates also serve to protect burner 30from clogging up with ashes. The air for proper combustion for the hardfuel and for the gases from burner 30 is taken in preferably from theopposite end of the stove at intakes 33 and is caused to fiow beneathfalse bottom 36 through passage 37 before entering ash pit 34. Bottom 36is V shape to purposely contract passage 37 at a point centrally beneathburner H, thereby assuring preliminary heating of the air before thesame reaches fire pot B and this is found to be of great benefit toassure perfect combustion of the gas and coal when both are usedtogether at the fire pot and which double firing is sometimes needfulwhere extreme heat is required or when the coal or coke is wet or ofpoor quality.

that we claim is:

1. A kitchen range provided with a space in its top extending from thefront of the range to the rear thereof and a partition which dividessaid space into a rear draft fiue in communication with the fire pot anda front space, said front space being provided with gas burners andhaving dampers at its ends by which the products of combustion from thefire pot can be prevented from reaching said gas burners, and providedwith holes in its top adapted to be closed by lids.

2. A kitchen range adapted to use both solid and gaseous fuel andprovided with a draft space at its top extending from the fire pot tothe rear of the range and a partition dividing said space into a draftfine at the rear and a front space, respectively, dampers at the ends ofsaid front space adapted to exclude the products of combustion from thefire pot, and gas burners mounted in said front space between saiddampers.

3. A convertible solid fuel and gas range having a fire pot adapted toburn gas or solid fuel provided with a top space which extends from thefire pot to the rear of the range and a partition dividing said spaceinto a rear draft, flue and a front space, dampers at the ends of saidfront space adapted to be closed when gas is burned therein and to beopened for draft from the fire pot when hard fuel is exclusively used,and burners in said front space, the top of the range being providedwith holes for vessels over said front space and means to cover saidholes.

4. In kitchen ranges, a range having a fire-pot for solid fuel and agrate at the bottom thereof, in combination with a tubular gas burnerbeneath the outer edge of said grate and an ashguard closed over theimmediate top of said burner and having a downwardly inclined portioninward from said tube provided with perforations, whereby openings areprovided for the passage of the gas flame to said grate and ashes areshed from the said guard.

In testimony whereof We aflix our signatures in presence of twowltnesses.

CHARLES H. MILLER. CARL H. MILLER, JR.

WVitnesses:

E. M. FISHER, R. B. Mosnn.

